Rock Springs Roundup Day 93

Operations resumed on January 6.  Gather stats through January 7:

  • Type: Planned
  • Method: Helicopter
  • Horses captured: 3,355, up from 3,121 on Day 61
  • Average daily take: 36.1
  • Capture goal: 4,400
  • Removal goal: 3,500
  • Returned: 488, up from 181 on Day 61
  • Deaths: 20, up from 16 on Day 61
  • Shipped: 2,877, up from 2,838 on Day 61

The second part of the roundup is getting off to a bad start from a data viewpoint, not that the first part was any better.  The numbers for Day 93 sum to 115, not 112:

Rock Springs Roundup Data Day 92 01-08-22

Day 61 went out with 181 horses returned to the area but the gather page now shows 488.  The increase was not documented in the daily reports.

Three horses were put down on Day 92 and one died from a broken back, bringing the death rate to 0.6%.

The total includes 1,311 stallions, 1,357 mares and 687 foals.  The gather page shows 1,308 stallions.

Foals represented 20.5% of the horses captured.  Of the adults, 49.1% were male and 50.9% were female.

A birth rate of 20% implies a growth rate of 15% per year, assuming a 5% death rate.

Body condition scores were not reported.

Gather activity has shifted to White Mountain and Little Colorado.

Rock Springs HMAs 10-13-21

The number of animals shipped has not been reported at the gather page but the total, based on the daily reports, is 2,877.

If 3,352 have been captured, as stated at the gather page, and 20 have died, the largest number of horses that could be returned to the area is 3,352 – 2,877 – 20 = 455, not 488 as stated in the cumulative totals.

Other statistics:

  • AML: 2,165 (across five HMAs)
  • Forage assigned to horses: 25,980 AUMs per year
  • Pre-gather population: 5,105
  • Forage liberated to date: 40,260 AUMs per year
  • Water liberated to date: 33,550 gallons per day
  • Forage assigned to livestock: 191,791 AUMs per year (estimated)
  • Horses displaced from HMAs by livestock: 15,982 (32% of off-range holding)
  • True AML: 18,147

RELATED: Rock Springs Roundup Day 61.

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